w3resource

C++ Exercises: Display the pattern like a pyramid with an asterisk

C++ For Loop: Exercise-40 with Solution

Write a program in C++ to make such a pattern like a pyramid with an asterisk.

Sample Solution:-

C++ Code :

#include <iostream>
#include <string>
using namespace std;

int main()
{
   int i,j,spc,rows,k;
    cout << "\n\n Display such a pattern like a pyramid with an asterisk:\n";
    cout << "------------------------------------------------------------\n";
    cout << " Input number of rows: ";
    cin >> rows;
   spc=rows+4-1;
   for(i=1;i<=rows;i++)
   {
         for(k=spc;k>=1;k--)
            {
              cout<<" ";
            }
	   for(j=1;j<=i;j++)
	   cout<<"*"<<" ";
	cout<<endl;
    spc--;
   }
}

Sample Output:

 Display such a pattern like a pyramid with an asterisk:               
------------------------------------------------------------           
 Input number of rows: 5                                               
        *                                                              
       * *                                                             
      * * *                                                            
     * * * *                                                           
    * * * * *

Flowchart:

Flowchart: Display the pattern like a pyramid with an asterisk

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to make such a pattern like a pyramid with numbers increased by 1.
Next: Write a program in C++ to make such a pattern like a pyramid using number and a number will repeat for a row.

What is the difficulty level of this exercise?



Share this Tutorial / Exercise on : Facebook and Twitter

C++ Programming: Tips of the Day

What is a smart pointer and when should I use one?

This answer is rather old, and so describes what was 'good' at the time, which was smart pointers provided by the Boost library. Since C++11, the standard library has provided sufficient smart pointers types, and so you should favour the use of std::unique_ptr, std::shared_ptr and std::weak_ptr.

There was also std::auto_ptr. It was very much like a scoped pointer, except that it also had the "special" dangerous ability to be copied - which also unexpectedly transfers ownership.

It was deprecated in C++11 and removed in C++17, so you shouldn't use it.

std::auto_ptr<MyObject> p1 (new MyObject());
std::auto_ptr<MyObject> p2 = p1; // Copy and transfer ownership. 
                                 // p1 gets set to empty!
p2->DoSomething(); // Works.
p1->DoSomething(); // Oh oh. Hopefully raises some NULL pointer exception.

Ref : https://bit.ly/3mc9GHE